meson: Tell cargo to prefer static libraries

amyspark requested to merge amyspark/gst-plugins-rs:fix-windows-builds into main

This fixes most, but not all, of the build errors in Windows when using static libraries.

The ones remaining are:

  • redirection of gstreamer-1.0 towards gstreamer-full-1.0
  • Cairo not exporting the C++ stdlib requirement when built statically

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